Discharge Lamp for Unipoplar, Dielectrically Impeded Discharge
a discharge lamp and dielectric block technology, applied in the direction of gas discharge lamp details, electric discharge tubes, gas discharge tubes, etc., can solve the problem of a relatively long time period
Inactive Publication Date: 2009-11-19
OSRAM GMBH
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- Abstract
- Description
- Claims
- Application Information
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Benefits of technology
[0045]The option of allowing the electrode groups which are not located in the bright operational phase to be very dark and therefore of virtually switching them off forms a particular advantage of the invention. In fact, discharge lamps which are operated, for example, with mercury-containing plasma can barely be used in an operating mode associated with continuously successive restarting operations.
[0046]In accordance with a further configuration of the invention, the splitting into separately operable groups can be taken further still to form units which are referred to here as electrode subgroups. These units are intended to be assigned dyes of different colors, preferably three or more, with the result that, in the case of the respective pulse-like backlighting of a display screen region with pixels which have just been redescribed with image information, a sequential sequence of differently colored backlighting pulses is produced. A color representation without the use of the actually conventional and high-loss color filters and without the loss of the spatial resolution of the brightness filter, in particular liquid crystal display, can therefore take place.
[0047]In addition, matching to image contents, i.e. their brightness values in certain parts of the image, can also take place. Thus, for example, in the case of an image with a light sky over a dark lower image region, the electrode groups in the upper region can be operated at a higher power than in the lower region.
[0048]The invention will be explained in more detail below with reference to an exemplary embodiment with different variants. The features disclosed herein can also be essential to the invention in other combinations.
Problems solved by technology
Discharge lamps in which so-called dielectrically impeded discharges are generated by a dielectric barrier between the electrodes or at least the anodes and the discharge medium have been known for a relatively long period of time.
Method used
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Embodiment Construction
[0004]Following on from this prior art, the invention is based on the technical problem of specifying a novel and improved construction for a corresponding discharge lamp.
[0005]To this end, the invention is directed to a discharge lamp with a bottom plate, a top plate for the light exit which is at least partially transparent, a discharge space between the bottom and the top plate for accommodating a discharge medium, a set of anodes and cathodes for generating dielectrically impeded discharges in the discharge medium, the anodes and cathodes being labeled as such and being able to be distinguished from one another as well as being in the form of strips, and at least the anodes being separated from the discharge medium by a dielectric barrier, characterized in that the cathodes and the anodes, apart from peripheral regions, occur in each case in pairs, that is to say each anode is adjacent to an anode and a cathode and each cathode is adjacent to a cathode and an anode.
[0006]The inv...
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The invention relates to a discharge lamp with a floor plate and a roof plate designed for dielectrically impeded discharge, in which the cathodes and the anodes always occur in pairs.
Description
TECHNICAL FIELD[0001]The present invention relates to a discharge lamp with a bottom plate and a top plate, which display lamp is designed for dielectrically impeded discharges.PRIOR ART[0002]Discharge lamps in which so-called dielectrically impeded discharges are generated by a dielectric barrier between the electrodes or at least the anodes and the discharge medium have been known for a relatively long period of time. An important application case is in so-called flat lamps, whose discharge vessel is constructed from a bottom plate and a top plate or at least contains these two plates as essential parts in addition to other parts such as, for example, a frame connecting them. Such flat lamps can be used in particular for backlighting monitors, display screens and other display devices, but are also suitable for general lighting. The discharge vessel is flat, i.e. has a markedly smaller extent in one dimension than in the other two dimensions.[0003]As regards the prior art, referen...
Claims
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Login to View More IPC IPC(8): G09G3/36H01J65/00G02F1/13357
CPCG02F1/133604G02F2001/133622H01J65/046H01J61/305G09G3/342G02F1/133622G02F1/1335H01J61/067H01J61/30H01J65/04
InventorHITZSCHKE, LOTHARVOLLKOMMER, FRANK
OwnerOSRAM GMBH